Merge in turn? No way pal!

[Barry Dragon]

That'll be a worse queue though won't it?. As there will be more waiting to let people in. Rather than single file.

If I understand what you mean.

No filtering in at one place rather than multiple places over the length of the queue is proven to be the most efficient way or merging.

By merging at all sorts of places this causes more backups and slower traffic flow. Quicker to all do it at one place. One placed at the end where you are meant to.